99944281 has 4 divisors (see below), whose sum is σ = 100120500. Its totient is φ = 99768064.

The previous prime is 99944267. The next prime is 99944287. The reversal of 99944281 is 18244999.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46785600 + 53158681 = 6840^2 + 7291^2 .

It is a cyclic number.

It is not a de Polignac number, because 99944281 - 2⁵ = 99944249 is a prime.

It is a super-2 number, since 2×99944281² = 19977718609213922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99944287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87256 + ... + 88393.

It is an arithmetic number, because the mean of its divisors is an integer number (25030125).

Almost surely, 2^99944281 is an apocalyptic number.

It is an amenable number.

99944281 is a deficient number, since it is larger than the sum of its proper divisors (176219).

99944281 is a wasteful number, since it uses less digits than its factorization.

99944281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176218.

The product of its digits is 186624, while the sum is 46.

The square root of 99944281 is about 9997.2136618160. The cubic root of 99944281 is about 464.0726591155.

The spelling of 99944281 in words is "ninety-nine million, nine hundred forty-four thousand, two hundred eighty-one".